Ordnance sighting apparatus.



A. T. DAWSON 61 G. T. BUCKHAM.

ORDNANCE SIGHTING APPARATUS.

APPLICATION FILED 111115 21.1911.

1 00,354. @1 Patented Apr. 15, 1919.

m: mum! PETERS mAPNoIo-urnn, wsnmomu n c ",TEN'QLANDL {772 01111 {whomit-may'concem:

f Be it known that we, Sir ARTHUR TREVOR Dawsomw knight, 3 and GEORGETHOMAS oK AM,;;both subjects of the King of reatg Britain, residing atVickers House,

ndon,-England,- have invented certain new andgus'eful Improvements in orRelating to "Qrdnance Sighting Apparatus, of which the ollowing is aspecification. srllihisyinvention relates to sighting appairtysbithe-kind"comprising a sight bracket dlei 'fonkrangeadjustments andwhich has a \Inrsuch apparatus it is usual to mploy ian-zarm elevatedfor range on which efdeflectioh pdial; and the handle of the deflectiongearare carried and to mount heeirangegadjusting gear on a plate onsuchnganiarrang'ement the relationship or relativ sp Hdethesrangedial'alters every time a range suggested: :Eorpreventing suchalteration in ableliwhena the sighting apparatus is detoigive'zlar'gerange adjustments. lkccordi ngwto'the present invention we soinFsighting-apparatus of the kind above set forth, that the deflectiondial can be'carried by the gun cradle, preferably upon the plateorabracket that carries the range dial. In this manner-not only is therelationship between the Jdials maintained constant, but 7, n'o'trouble:isexperienced in regard to the overhead decks of a ship or to the roofof -a; shield when the sights are in the fool Tproofposition.' 'Bytheterm fool proof positionsis imeant the position of'the telerang 'evisputone'the sight, while the gun Thisflofivcourse is not a working position,but :the'overheaddecks and the roof of the tilin order thatthe' 'saidinvention may be ORIDNAIN'CE swarms aPPAaA'r s.

Specification of Ietters Patent.

' Applicationfiled'J'une21,1917.SerialNo.'176,112.

Broadway, ;Westminster, in the county of a smallerscale, showingamodified form of the sighting apparatusawith the gun assumedto beat itsmaximum angle of elevaa d hich ispivotallymounted on thegun-craightZ-carrier 'pivoted thereto for lateral ad-v V ack'et'attached toethe; gun cradle. With osition-ebetween the deflection dialdjilstment iseimade, although in sighting apparatus 'zof otherrkindsmeans have been, i

provided a toothed bevel arc D. connected lationship whichisparticularly undesir-.- I

' D-w1thwhich gears a worm bonded by nstruct w'andaarrange thedeflection gear scopesydeflection arms, etc., when maximum itself-is"registering maximum depressionv shield 'have'tobe made to clear suchposiearlyiunderstoodfand readily carried into efieeqfwveiwill describethe same more fully.

.LITED N orFrcE;

TREVOR DAWSON AND-GEORGETHOMAS BU'CKHAM, or -wnsrivrmsrnn, Lennon,ENGLAND, ASSIGNORS T0 vromms LIMITED, or w'nsrmms'ran,

"" Patentedripr. 1 5

' r with reference to-ithe accompanying? 'draw- Figure is a s deelevation showing a form of s1ght ngapparatusf constructed in Yaccordance wlth' ourinvention. 7

Fig. 2 is a view similar to "Fig- 1- Fig. 3 is anen'd elevation'oi. Q-viewed in the direction of the 'arrowy-in the' latter figure and drawnto a larger scale, apor- "the sight carrier. Biisthe'deflection dial andB' the handle of the'deflectionrgear." C lsthe range dial and G:thehandleef. the

said plate or bracket attached tol-thezgun range adjusting gear which inthe examples c j shown comprises. a cam (3 D: is the aforecradle The:saidplate carries thedials B" n and. 6.; the ,handles'iB'. and C ,andthe 1-In the ci mple i fthere' is to or made integral with a worm wheelare a spindle b operated by the deflection handle. B. Meshingjwith thebevel arc D is a pinion a carried bya spindle a mounted in bearings onthe, sight bracket A and connected by suitable gearing such as a' zscrewand:nut with the sight carrier A. The

said bevel arc D is mounted co-axially with the pivot of the sightbracket-A and owing to theengagement of the aforesaid worm b with theworm wheel arc D, is prevented from moving during the elevation of thesight bracket by the cam C As the pinion a meshing with the bevel arc Dis carried by the sight bracket, the elevation ofthe latter'causesthe'pinion to run on the bevel arc and the sight carrier'is therebyjau'to- -matically deflected for drift. 'VVhen the de- -'fl'ectionhandle B is operated the be'velarc "D is angularly displaced 'relativelyto the sight bracket and the pinion is thereby rotated to impart thespeed-of target deflection to the sight carrier -A'.' The spindle b" is{rovided with another worm, b for -a'ctuat1ng the deflectioa dial or itspointer;

- In the example shown by igs. 2 and 3 the adjustment for drift is aarranged by placing the sight frame A, the plate D attached tothewguncradle and the cam, C

on an axi'sfwhich'is calledthe 'drift jaxis,

inclined" to the gun trunnion aX'is.*"When range is put on the sight thesight frame A is rotated around the drift aXis by means j of the, cam Coperating on the push rod 10 connected to'the frame "A.-

Adj ustment for deflection is made through the spindle b which isconnected by bevel pinions to*-a screW b engagin'g with a 'nut 72* whichcarries a member B having a curved slot B concentric with the drlft-axis;" the sight-carrier A has an upwardly inclined deflection-arm Acarryingiashoe 'A 'disposed in'the said curved slot' B the sight carrierA is'made to'rotate on the de'flectionpivot" by-means of the member Awhich receives its motion from the member B moved by means of the nut Bat right angles to the-deflection pivot,

During the range adjustment vof the sight the shoe A slides in the saidcurved slot-1' B a'ndis draWn up an'd down the slot by' the sight frameA so as to obviate any bend-p in'g actionon the 'arm' A thus connectlonis maintained at "all times between 1the-' deflection'gearand thedeflection arm A The 5 latter is connected by a'trans'verserod a to thedeflection arm"appertainingtofthe 7 We'cla'im Iters'PatentoftheUnitedfstates is V 1. In ordnance sighting apparatus,the

combination with theguncraidle off, a 'sight bracket pivotally mountedon the gun cradle "for rz'tng'e adjustments, asight' carrier p'iv ote dto the/sight bracket forflateral adjust- 'ments, range adjusting gear,including a rangeindicatoncarried by the gun cradle 4 5 i j cradle.

and deflection" adjusting gear, including a deflection indicator gal'sojcarried by the gun 2. In ordnance sighting apparatus, the

" combination With the gun'cradleof a sight 'bracketpivotally mounted onthe "gun cradle for range 'a djustments, asight-carrier piv- "oted to'the sight'bracket for lateral'adjustments, range adjustingfigear,including a range indlcator and a range setting handle both carriedbythegun cradlegand deflection adjusting Igear-"includinga deflection."in'dicaton and "a deflection setting "handle bothalso carr-iedbytheguncradle, 7

for rangeadj ustments, oted to the sight bracket for lateral adjust Vments, ra'nge "adjustingf'gear including a;

"range indicator, deflection-adjusting gear ncluding a deflectionindicatonfandia p'lateig '-3.In ordnance slghting f apparatus, the

1 6'0"" combination with thei gu'n cradle of a si'ght 5 bracketpivotally' mounted en the gun jcrafdle range indicator carried by the i6. :In ordnance' s'ifghtin'gf apparatus,

"sight on the opposite side the mounting a sight carrierpivcombinationz'with the-:gun era ,attached to the gun ;cradle,-.thesaid plate [carrying both said'indicating' devices.

4:. In ordnance sighting apparatus, the combination with the gun cradleof a sight bracket pivotally' mounted'on the cradle for rangeadjustments, a sight carrier pivoted to the sight bracket for lateraladjust:

ments, range adjusting gear, including a deflection adjusting gear,including a defiectio'n indica'tor also carried by the gun cradle, and amember operating to movethe sight for deflection adj us'tments and alsofor -automatic-driftadjustments-g. c

- 5. y In era ance sighting apparatus, 1 the combination with therguncradle of'f' a sight bracket pivotally mounted on the g ncradb forfrangeadj ustments, a 'sight carri'er pivoted to' the" sight bracketforf'-lateral ad] ust c c merits, rangea'djusting gear, includ'in'g a 7 rangeindicator carried by the gun cradle, V

a deflection setting handle and a deflectionindicator- 'carried by: thegun r'iradle, a'

toothed member connected' by lockingz gearin withthedeflectionsetting'handle' mfl s V -whereby on aotuat'ion' 'of; said 'ha ndle thesaid membervimparts*defiection' to thesight carrier a1'id*rneanswherebyduring 'the'i ange a' djustment of the sight 'bracket the *s'aid g cmember imparts automatic driftmovement tothesight carrier.

V th oinbinatio'n' with: theigun': cradle of a a deflection, settinghandle, 5 a' member moved laterally :"byl said 5 handle, a second memberfor transmitting deflection tozthesight carrier, this "member "movingwith :the sight "bracket during range '"adjustments-g and a1s)lidingconnection between said two mem "ers.

' *7. -"In ordnance sighting app'aratus, the

combination With' the gun-cradle of a sight {bracket pivotally mountedon the guncradle 'for range adjustments, a sight' carriervp-iv- 1 otedto the sight. bracket for lateral adjustments, range adjusting :gear,including a range indicator carried by-the gun' cradle,

deflection adjusting "gear, including a: 'deflection indicator carriedby the 'gun cradle,

"a deflection" setting handle, a curved membcr moved laterally 7 bysaid? handle-arid a second member for transmitting deflection to 4 thesight carrier, "this member moving Wvith the sight bracket duringrange'ad-just} "ments and being slidablyrengaged With th'e first 1mentioned member". a 8. In "ordnance "sightingapipeamtu z -th of wii ghtbracketp'ivotally mounted on the gun cradle to move during rangeadjustments about a one axis at an angle to the gun trunnion v axis,"asight carrier pivoted to the sight f5 bracket forlateral adjustments,range adjusting gear, including a range indicator carried' by the guncradle, deflection adjusting gear, including a deflection indicatorcarried by the gun cradle, a deflection set- 1 ting-handle, a curvedmember moved laterlb opies of this patent may be obtained for ally bysaid handle and a second member for transmittin deflection to the sightcarrier, this mem er moving With the sight bracket during rangeadjustments and being slidably engaged with the first mentioned member.

In testimony whereof We affix our signatures. g

ARTHUR TREVOR DAl/VSON. GEORGE THOMAS BUCKHAM.

five cents each, by addressing the Commissioner of Patents, Washington,D. C.

